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