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