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