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