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