One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,6,7)(3,4,8,11)(5,13,15,9)(10,14,16,12)(17,18)(19,22)(20,24)(21,25)(23,26)(27,30)(28,29)(31,32)(33,34,38,40)(35,36,42,44)(37,39,48,47)(41,43,45,46)(2,7)(4,11)(9,13)(12,14)(17,19)(18,22)(20,27)(21,26)(23,25)(24,30)(28,31)(29,32)(33,35)(34,36)(37,45)(38,42)(39,46)(40,44)(41,48)(43,47) involution — undirected(2,7)(3,8)(9,13)(10,16)(19,26)(22,23)(27,32)(30,31)(33,36,38,44)(34,35,40,42)(37,43,48,46)(39,41,47,45)(1,3)(2,4)(5,10)(6,8)(7,11)(9,12)(13,14)(15,16)(17,19)(18,23)(20,27)(21,26)(22,25)(24,31)(28,30)(29,32)(33,36)(34,35)(37,46)(38,44)(39,45)(40,42)(41,47)(43,48) involution — undirected(1,4)(2,8)(3,7)(5,14)(6,11)(9,10)(12,15)(13,16)(17,18)(19,22)(20,28)(21,25)(23,26)(24,29)(27,31)(30,32)(33,37)(34,39)(35,41)(36,43)(38,48)(40,47)(42,45)(44,46) involution — undirected(1,5,6,15)(2,9,7,13)(3,10,8,16)(4,12,11,14)(17,20)(18,24)(19,27)(21,29)(22,30)(23,31)(25,28)(26,32)(33,34)(35,36)(37,47)(38,40)(39,48)(41,46)(42,44)(43,45)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.