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