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