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