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