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