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