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