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