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