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