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