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