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