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