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