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)(19,24)(20,31)(21,26)(22,37)(23,27)(25,33)(28,45)(29,39)(30,40)(32,48)(34,43)(35,41)(36,44)(38,47)(42,46) involution — undirected(1,3)(2,5)(4,8)(6,7)(9,10)(11,14)(12,13)(15,16)(17,19)(18,24)(20,32)(21,35)(22,30)(23,29)(25,42)(26,41)(27,39)(28,34)(31,48)(33,46)(36,47)(37,40)(38,44)(43,45) involution — undirected(10,13)(14,16)(17,20,22,33,23,34,21,36)(18,25,26,31,27,44,37,43)(19,28,30,47,29,32,35,46)(24,38,41,45,39,42,40,48)(2,6)(5,7)(9,11,12,15)(10,14,13,16)(19,29)(24,39)(28,32)(30,35)(38,42)(40,41)(45,48)(46,47)(3,8)(5,7)(10,13)(14,16)(17,21,23,22)(18,26,27,37)(19,30,29,35)(20,33,34,36)(24,40,39,41)(25,43,44,31)(28,46,32,47)(38,45,42,48)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.