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