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)(19,22)(20,27)(21,24)(23,28)(25,31)(26,30)(29,32)(33,34)(35,40)(36,44)(37,38)(39,43)(41,47)(42,48)(45,46) involution — undirected(2,7)(4,8)(10,15)(12,13)(17,19,21,26)(18,22,24,30)(20,25,28,32)(23,29,27,31)(33,35)(34,40)(36,37)(38,44)(39,45)(41,48)(42,47)(43,46)(17,18,21,24)(19,22,26,30)(20,23,28,27)(25,29,32,31)(33,36,39,47)(34,41,43,44)(35,42,45,37)(38,46,48,40)(1,3,6,9)(2,8,7,4)(5,11,14,16)(10,13,15,12)(17,18)(19,22)(20,23)(21,24)(25,29)(26,30)(27,28)(31,32)(33,36)(34,41)(35,37)(38,46)(39,47)(40,48)(42,45)(43,44)(1,4,6,8)(2,9,7,3)(5,13,14,12)(10,11,15,16)(17,19)(18,22)(20,25)(21,26)(23,29)(24,30)(27,31)(28,32)(33,37)(34,38)(35,36)(39,42)(40,44)(41,46)(43,48)(45,47)(1,5,6,14)(2,10,7,15)(3,11,9,16)(4,12,8,13)(17,20)(18,23)(19,25)(21,28)(22,29)(24,27)(26,32)(30,31)(33,38)(34,42)(35,44)(36,46)(37,43)(39,48)(40,47)(41,45)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.