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