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