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