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