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