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