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