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