One vertex per element, one color per generator, with an edge from x to x·s.
(5,6,11,16,12,17,10,31)(7,18,22,33,21,35,20,13)(8,23,25,19,26,14,32,34)(9,27,29,24,30,36,28,15)(1,2,3,4)(5,7)(6,13,17,33)(8,24,26,15)(9,19)(10,20)(11,22)(12,21)(14,29)(16,18,31,35)(23,28)(25,36,32,27)(30,34)(2,4)(5,8)(6,14)(7,15)(9,18)(10,25)(11,32)(12,26)(13,29)(16,19)(17,23)(20,27)(21,24)(22,36)(28,33)(30,35)(31,34) involution — undirected(5,9,10,28,12,30,11,29)(6,15,16,27,17,24,31,36)(7,19,20,23,21,34,22,14)(8,18,25,33,26,35,32,13)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.