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