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