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