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