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