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