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