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