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)(12,13)(14,16)(17,18,22,27)(19,28,30,23)(20,25,31,24)(21,32,29,26)(1,2)(3,6)(4,7)(5,8)(17,19,22,30)(18,23,27,28)(20,29,31,21)(24,26,25,32)(10,13)(14,15)(17,20,22,31)(18,24,27,25)(19,21,30,29)(23,32,28,26)(9,10)(11,14)(12,13)(15,16)(17,20)(18,25)(19,29)(21,30)(22,31)(23,32)(24,27)(26,28) involution — undirected(1,3,5,4)(2,6,8,7)(9,11)(10,14)(12,16)(13,15)(17,18)(19,23)(20,25)(21,26)(22,27)(24,31)(28,30)(29,32)(1,4,5,3)(2,7,8,6)(17,21,22,29)(18,26,27,32)(19,20,30,31)(23,25,28,24)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.