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