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