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