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