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