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