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