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)(19,25)(20,28)(21,26)(22,23)(24,30)(27,29)(31,32)(2,6)(3,8)(10,11)(14,15)(18,23)(21,25)(24,28)(29,31) involution — undirected(1,3)(2,4)(5,8)(6,7)(9,11,13,10)(12,15,16,14)(18,23)(19,26)(24,28)(27,32)(1,4)(2,3)(5,7)(6,8)(9,12)(10,14)(11,15)(13,16)(17,19)(18,21)(20,27)(22,26)(23,25)(24,29)(28,31)(30,32) involution — undirected(1,2)(3,4)(5,6)(7,8)(17,20)(18,24)(19,27)(21,29)(22,30)(23,28)(25,31)(26,32) involution — undirected(1,4)(2,3)(5,7)(6,8)(17,21)(18,19)(20,29)(22,25)(23,26)(24,27)(28,32)(30,31) 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.