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