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