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