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