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)(17,18,23,27)(19,28,30,20)(21,32,24,25)(22,26,29,31)(1,3,6,2)(4,8,5,7)(17,19,23,30)(18,20,27,28)(21,29,24,22)(25,31,32,26)(10,13)(14,16)(17,20,24,26,23,28,21,31)(18,19,25,29,27,30,32,22)(1,4,6,5)(2,7,3,8)(9,11,12,15)(10,14,13,16)(17,21,23,24)(18,25,27,32)(19,29,30,22)(20,31,28,26)(1,5,6,4)(2,7,3,8)(17,22,21,30,23,29,24,19)(18,26,32,20,27,31,25,28)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.