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