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