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