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