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