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