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