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)(25,29)(27,28)(31,32)(2,5)(6,8)(9,10)(11,15)(12,14)(13,16)(17,18,22,19,23,26,21,24)(20,28,32,29,30,25,31,27)(1,3,4,7)(2,6,5,8)(9,11)(10,13)(12,16)(14,15)(17,19,21,18,23,24,22,26)(20,29,31,28,30,27,32,25)(11,16)(13,15)(17,20,23,30)(18,25,26,28)(19,27,24,29)(21,31,22,32)(10,14)(13,15)(20,30)(25,28)(27,29)(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.