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