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