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