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