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