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