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