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