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