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