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