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