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