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