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