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