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