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