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