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