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