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