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