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