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