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