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