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