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