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