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