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