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