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