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