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