One vertex per element, one color per generator, with an edge from x to x·s.
(2,7)(3,8)(9,13)(10,15)(34,36)(35,38)(41,44)(42,45) involution — undirected(1,2,6,7)(3,4,8,11)(5,13,14,9)(10,16,15,12)(17,18)(19,22)(20,28)(21,24)(23,29)(25,27)(26,31)(30,32)(33,34,39,36)(35,40,38,43)(37,44,46,41)(42,48,45,47)(3,8)(4,11)(10,15)(12,16)(17,18,21,24)(19,25,27,22)(20,23,29,28)(26,31,32,30)(33,35,39,38)(34,40,36,43)(37,45,46,42)(41,48,44,47)(1,3,6,8)(2,4,7,11)(5,10,14,15)(9,12,13,16)(17,19,21,27)(18,22,24,25)(20,26,29,32)(23,30,28,31)(33,36,39,34)(35,40,38,43)(37,44,46,41)(42,47,45,48)(1,4)(2,8)(3,7)(5,12)(6,11)(9,15)(10,13)(14,16)(17,18)(19,22)(20,23)(21,24)(25,27)(26,30)(28,29)(31,32)(33,37,39,46)(34,41,36,44)(35,42,38,45)(40,47,43,48)(1,5,6,14)(2,9,7,13)(3,10,8,15)(4,12,11,16)(17,20,21,29)(18,23,24,28)(19,26,27,32)(22,30,25,31)(33,38,39,35)(34,40,36,43)(37,45,46,42)(41,47,44,48)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.