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