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