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