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