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