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