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