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