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