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