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