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