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