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