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