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