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