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