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