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