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