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