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