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