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