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