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