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