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