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