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