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