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