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