One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,4)(5,8)(6,7)(9,10,13,12)(11,15,16,14)(17,18,23,20)(19,27,29,24)(21,25,31,28)(22,30,32,26)(9,11,13,16)(10,14,12,15)(17,19)(18,24)(20,27)(21,26)(22,28)(23,29)(25,32)(30,31)(2,7)(3,8)(17,18,23,20)(19,27,29,24)(21,28,31,25)(22,26,32,30)(1,3,6,8)(2,4,7,5)(9,12,13,10)(11,15,16,14)(17,20,23,18)(19,27,29,24)(21,28,31,25)(22,30,32,26)(1,4,6,5)(2,3,7,8)(17,21,23,31)(18,25,20,28)(19,26,29,30)(22,24,32,27)(1,5,6,4)(2,8,7,3)(17,22)(18,26)(19,28)(20,30)(21,24)(23,32)(25,29)(27,31)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.