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