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