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