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