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