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