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)(17,18,23,22)(19,24,28,31)(20,25,29,30)(21,27,32,26)(1,3,5,4)(2,6,8,7)(9,11)(10,13)(12,15)(14,16)(17,19)(18,24)(20,27)(21,30)(22,31)(23,28)(25,32)(26,29)(10,14)(11,15)(17,20)(18,25)(19,27)(21,31)(22,30)(23,29)(24,32)(26,28) involution — undirected(10,14)(13,16)(17,21,22,27,23,32,18,26)(19,20,24,30,28,29,31,25)(1,4,5,3)(2,7,8,6)(20,29)(21,32)(25,30)(26,27)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.