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