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