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