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