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