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