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