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