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