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