One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,4)(5,9)(6,7)(8,12)(10,11)(13,14)(15,16)(17,18)(19,22)(20,24)(21,25)(23,26)(27,30)(28,29)(31,32)(33,34)(35,40)(36,37)(38,44)(39,41)(42,43)(45,48)(46,47) involution — undirected(2,7)(3,8)(9,16)(10,13)(17,19)(18,22)(20,27)(21,26)(23,25)(24,30)(28,31)(29,32)(33,35,39,45)(34,40,41,48)(36,47,43,38)(37,46,42,44)(2,7)(3,8)(9,16)(10,13)(19,26)(22,23)(27,32)(30,31)(34,41)(35,45)(36,43)(44,46) involution — undirected(1,3,6,8)(2,4,7,12)(5,13,15,10)(9,14,16,11)(17,19)(18,23)(20,27)(21,26)(22,25)(24,31)(28,30)(29,32)(33,36,39,43)(34,42,41,37)(35,38,45,47)(40,46,48,44)(1,4)(2,8)(3,7)(5,14)(6,12)(9,10)(11,15)(13,16)(17,20)(18,24)(19,27)(21,29)(22,30)(23,31)(25,28)(26,32)(33,37,39,42)(34,43,41,36)(35,46,45,44)(38,48,47,40)(1,5,6,15)(2,9,7,16)(3,10,8,13)(4,11,12,14)(17,18)(19,22)(20,28)(21,25)(23,26)(24,29)(27,31)(30,32)(33,38)(34,44)(35,36)(37,40)(39,47)(41,46)(42,48)(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.