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