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)(11,14)(12,13)(15,16)(18,23)(20,25)(24,27)(30,32) involution — undirected(2,6)(7,8)(17,18,21,23)(19,25,29,20)(22,24,31,27)(26,32,28,30)(1,3,5,4)(2,7,6,8)(10,13)(14,16)(18,24)(19,28)(20,25)(22,31)(23,27)(26,29)(9,11,12,15)(10,14,13,16)(17,19)(18,25)(20,23)(21,29)(22,26)(24,32)(27,30)(28,31)(1,4,5,3)(2,8,6,7)(17,20,21,25)(18,26,23,28)(19,27,29,24)(22,32,31,30)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.