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